You can apply for and obtain a DTV with it, BUT:

1. When extending in Thailand, you'll need to show ongoing activity. Keep in mind that you're applying for a 5-year Soft Power Visa, so it wouldn't make much sense to grant it for just a 6-month activity. It is a new visa with changing rules.

2. No one can predict future border requirements. So far, it seems fine

in most cases, but I saw one case yesterday where additional documents were required.