There is no guitar above anyones playgrade. If you won the lottery for example, you perhaps wouldn't think twice at buying the exact guitar you wanted - whether that is 1k, 10k or even 100k to learn on if you wanted. If you have the means to buy an expensive guitar, regardless of its price or your ability, it could still be worth buying if it encourages you to pick up and play, play play.
The more stable, the better it holds its tune, the more comfortable it is etc the better - especially for a 'beginner'. There is nothing worse than learning on a 'cheap' guitar that goes out of tune if you look at the bridge, the volume pot only works between 8-10 and an action that you can but War and Peace in between the Strings and Fretboard. Maybe Spending over £1k isn't a great idea for a child's first guitar on their 5th birthday but there is NO rule that says a beginner has to learn on a low price, entry level instrument.
If you are an Adult, earning your own money and can spend ~£3k on a Core PRS guitar, if it encourages you to play more, to practice more, to improve faster etc, then does it matter what your 'playgrade' is? Its your money and if you can afford to spend the asking price, you won't be asked to present your Grade 5+ music certificate to prove you have attained the necessary skills to buy a guitar that expensive...
