the point of insurance is to be "made whole"
after the claim is handled, you need to be in an equal state to where you were before
sometimes, that means they pay to fix your car, sometimes it means they pay you the value of your car so you can replace it
to me, the total loss thing makes sense, but if you are comfortable fixing it, have them total it, then buy it back and fix it
personally, ive come to a point where i simply dont always want to deal with fixing things myself
chasing down parts and rebuilding them may be fun on a project, but on a daily driver that needs to get back in rotation, id let the insurance pay a professional
but, thats just me