Your logic is brilliant:
Government gets too much money - so don't pay taxes!
Someone earns too much than I want - let's rob him!
You can agree with dev fee and use miner, or if you don't agree - don't use it.
If you want something good, but don't want to pay for it - you can try to steal/crack it and you will become rich But I have right to protect my property from such things, so in many cases you will fail even if you think that you cracked it, I already explained how miner will work in such situation.
If you just don't want to pay me for my job I can release miner without dev fee but a bit slower. But I doubt that it will be popular: everyone wants only the best. And for free, of course...
I could make dev fee twice less, but you barely notice even 5%, so 2.5% will not help you. So I'm sure the problem is not that you lose 5% for dev fee, the problem is that I earn "too much". If you think that I've already earned enough - create such miner as mine to estimate time, expertise and efforts that are necessary. Otherwise your words are senseless. If you are not so good to do it - may be it's a good idea to think that I earned these 6K XMR fairly?