ThoughtfulLychee5096 It is not just "weak" passport holders on tourist visas stopped. "Strong" passport arrivals on all types of visas can be stopped and questioned. Random questioning of arrivals Is part of the immigration process.
Tokyo Embassy is very strict on proof of the need to have a 5 year visa. Fukuoka and Osaka are much easier to get approved. I know a few Tokyo residents who chose to go there to get their DTVs. I chose to get mine in Taipei and met several other Tokyo residents doing the same as it approves much faster than Tokyo. You can apply from Laos, Cambodia etc when your TRV ends. Much easier to get the DTV there than Tokyo. Akirame naide kudasai!
You are fine working for a UAE firm, applying in London. You must not work for a Thai company/clients. The requirement is to present the docs relating to your place of work which can be in the UK or anywhere else in the world aside from Thailand.
ThoughtfulLychee5096 Wise is available in Thailand as I use it, and thousands of others do. Majority got the Wise card from their country of residence not Thailand, People buy property in Thailand via Wise and receive their overseas pensions via Wise. You should contact them direct and ask about opening an account from Thailand, on Reddit some say they opened an account via phone bill and apartment lease.
ThoughtfulLychee5096 Yeah WISE uses SWIFT, so send money to your WISE account and you can use a virtual card online. and transfer money online to other accounts. Starling, Monzo are other neobanks, not used them but know some do.