I don't think it makes you a hack at all. If you have a good ear, that's a powerful thing.
I write original music, so knowing a little theory in addition to the ear helps. It often takes me in new directions to consider a variety of options I might not otherwise consider. The more I use theory to discover combinations of notes, well, happy accidents occur.
But there are some excellent film and TV composers who work with orchestras on major projects who can't read music, just compose it and hire orchestrators to write it all out, and conductors to handle the recording sessions.
We're all different.
On the first line- I totally agree with this. To me, a MOST powerful thing. Meaning, that's why I said what I posted above about learning theory just not holding an importance too me. I DO NOT intend in any way to insinuate that I am, or my way is, superior or "right." Just that it's what works for me. My friend that I referenced is a good singer, and a SOLID rhythm guitar player. You could rattle off the most obscure chords and he knew them all, and had a good sense of rhythm, etc. But ask him to play a lead or especially make one up, and he was lost. Now, if you said A,G,D,G he could play those notes to a solo. He knew theory and a million chords. He was an engineer (designed the Stealth bomber! My dad always said he was the smartest man he ever knew) And, I started in classical music, so I did learn some theory, but I was young. I was playing Bach, Chopin etc., but while it may be in there somewhere, I haven't retained conscious knowledge of any of the theory.
I've just always done things by ear since I started playing guitar. Funny (to me) story about that. When I first started playing, I learned a bunch of songs, but some of them it would drive me crazy because there would be a note in the song I couldn't get down too. I had no idea until over a year later, that some of the stuff I was playing (Hendrix, Trower and others) were using half step down tuning. So I'd literally find the lowest note on an album, tune the low E string to that, tune the rest of the guitar to that, and then relearn the songs! Imagine how much easier some of them got when some of the riffs that I thought were tricky to play were especially tricky because they were using open strings in spots of the riff and in the wrong tuning I could not do that. Once retuned, some of those songs became MUCH easier to play.
More fun notes: It was not uncommon at all back then, to literally have to retune your guitar for almost every song on an album that you were playing along with! Whether it was speeded up/slowed down tape, or another thing that I read was common when there were only guitars and bass back then: Everyone would just tune to each other. SO, if the main guitar was just a bit flat of true A440, but in tune with itself, the bass would tune to the guitar and off they'd go recording a song. Or, the bass player would come in to do his part and the tape speed was off one way or the other so he'd have to tune to the guitar at the speed the tape was playing. (And there are MANY songs from back then, when one or more instruments are simply not in perfect tune with the others!) SO to play along, you were constantly retuning during the first verse of many songs, or for some (Early Ozzie!) literally stopping the album to retune between songs.
And yes, I know I talk too much at lunchtime.