For Pete's sake, don't get rid of it. It's all about nostalgia! I just used a bootleg update and now run Mac OS Catalina on my MacBook Pro 15" Unibody Mid 2009 and it works great. I just had the same thing happen and plan on repairing the screw holes any way I can. Apple's are the pinnacle of computers and last forever. I hated the fact that they forced its software obsolescence - But I found the workaround :-).
Fix it and keep that awesome MacBook