It’s not ideal, but it seems then, that for less money than many spend on upgrading exhausts etc. an owner could organise the modification themselves.
I’m spoiled for choice with skilled welders where I live and the dismantling/ reassembly work doesn’t seem too bad. For me, it would cost a fair bit just to get it to my nearest dealer anyway.
Another less invasive way of monitoring the condition of the area would be crack detection spray. These are usually sold in sets of three, a cleaner, a dye and and developer. This would show any defect at a very early stage without too much fiddling about.
I feel for any owners worrying about it, you need to have confidence is the safety of the car to fully enjoy it. The slight consolation is, the car will also always be valuable, unforeseen expense can at least be offset by minimal depreciation.