Yes, if the goal is the instrument and the instrument alone, then yes, I would agree! Even so, what you are going for might not be available on the market…
If, however, the process of “beefing up” is a big part of the whole experience, then why not!?!
It’s just like people buying an (old) Beetle or similar and pimping them up according to their own specs and ideas… it’s a fun process (for some)! 