Does it help to fully reset a Mac once a year to keep it "healthy"? So I’ve owned the MacBook Pro for about a year or so, upon looking at a list of ways to keep a a laptop healthy; was this operation in particular that stood out. To manufacture reset annually. I then circle around to my question(s), what if I were to reset my MacBook and not for selling? Would I still need to sign out of all accounts, being that I would be logging right back in after doing so? Also being this early in stages of ownership, should this be in option?

I have been really neurotic about keeping it clean and healthy since I’ve tarnished many PCs and traumatized by the aftermath. 

Any glimpse of help of info pointing me in the right direction of approaching this would help! Thanks you in all in advance
Resetting your MacBook Pro to factory settings each year definitely should not be necessary. I do not personally experience any performance problems or functionality problems even though I haven't "reset" in a decade (i.e. I migrate my existing system over when I buy new hardware).

If you do chose to factory reset, which I wouldn't recommend, you would need to sign into iCloud again after reinstalling. If you have your Keychain synced to iCloud, you don't need to start from scratch in amassing passwords and logins. However, you would probably need to login into various stuff once again (like for example login to Adobe subscriptions, Office 365 subscriptions, mail subscriptions, etc.).