There is public and private fastidiousness.
An example, I think, of my private fastidiousness is the way I arrange my objects in my jacket or coat pockets before I go out in the morning. I put my phone in my left-side pocket and my key and oyster card/debit card wallet in my right-hand pocket. I am right-handed, so I have easier access to the right side; I will need more immediate access to the travel card. I will not need immediate access to the keys (once I slam the front door) but they are necessarily away from the phone as they will clank and maybe scratch, which they cannot do with the little leather wallet, which is its necessary bed-fellow. When I have negotiated public transport I reverse the pockets, as the travel card will not be on-call during the day. This is all private fastidiousness.
An example, I think, of my lack of public fastidiousness is my unwillingness to go back and correct a text I have sent because of a spelling error or typo. Many people insist on this, as in Now Worries and then ten seconds later No as a correction. I would not bother with this unless there were true cause for confusion. If I sent See you at sex I suppose I might correct the sex to six,, but mostly I’d just let the typo hang. This may reflect badly on me if I have written here as hear or their as there and correspondants may have me down as an ignoramus, but this is one of the risks when you exhibit a non-fastidious devil-may-care life style.