2 days is not direct access, I understand why MFA wants applicants to have direct accessible money, and we are only talking about 500K baht. 500K might sound as a lot of money, but it are only baht, and you don't loose them.
That is not the discussion here, I agree that at the moment DTV has no extra requirements at entry, I already told that before. But I see no reason why this could not be changed, it would not create a precedent, because for other types of stay also exists checks upon entry.
There is not a single guarantee that what happens today will be the same in a year.
Also investers need having directly accessible money. And when living in a country without social security, not having directly accessible money is not a good idea, and 500K is not very much money, also investers should not invest their last bit of directly accessible money if they don't want to miss opportunities. Just ask professional investers, their portfolio is never 100 percent invested, because that prevents quick moves.
Netherlands the same, tourist have no limit, but as soon as you register at municipality, you only have 185 days, because you are no visitor anymore. I think the idea behind this is you cannot ask from visitors to get a drivers license. But of course car rental companies and insurance companies can have their own limits.
Immigration indeed stamps a new stay permit, but that is not different for a DTV visa or visa exempt, so why should it be normal that for non-oa there can be requirements, and not for other stay permits. In fact there are requirements for other stay permits, like the onward travel for the visa exempt stay permit. Now there are no special requirements for the 180 day stay permit of a DTV, but that can change in the future at any moment, because it will not be a change in the visa itself, but only in the requirements for the stay. I do not say it will change.