But sticking to the original question, why should other taxpayers who repair their own bikes, or pay to do so, subsidise someone such as yourself? It's a straight question - feel free to give a straight answer. The amount of tax you pay, the number of puppies you buy for orphans, how many buttons you leave in the Church collection plate are all completely irrelevant.
Personally, all power to you. I don't have an issue with it. But it appears that many people do, and their objections aren't without merit. A sensible, straight answer to a sensible, straight question might placate some of them somewhat, but evasive and diversionary comments serve only to reinforce their view.
PS - you need a better accountant if you're earning under £100k self employed and you're paying that much.