What CAD program is most useful nowadays? Would that als apply for a program like Fusion 360?

They are genuine reasons if you see the future of your financial system separate from the financial system of the EU. A future member should show that it’s willing to put all efforts to improve the financial situation of the common system and not just for itself. They just want to profit from the market, but if the financial system has problems, they would just act to their benefit - even if it would be harmful to the european financial system.

Your reply also shows that even pro EU brits are still too proud to share a future in a more federalized EU. If you are not willing to give up your currency, you are not willing to go for it completely. That’s not what the EU needs.