

You are saying you never read two vowels in a row?
No. I’m saying the ones which are umlauted don’t go with their umlauted partners. You can äiti easily. That’s mom. But you can’t have Äati. That’s not a word. Ä + a don’t go together.
I may be wrong because of how flexible Finnish is, but I don’t think a Finnish word exists where there is either äa oe öo combination. Äo maybe, but not likely. (edit def no äo either, just not a thing, I checked the exceptions and now I’m sure)
Its something calmed vowel harmony, which is sort of why I don’t see Polish as being any where near Finnish. The amount of consonants you guys use is unnatural to a Finnish person.
Finnish pronunciation is definitely not a “subset of Polish”. Polish is a PIE-language. We’re not even in the same language tree bro.
https://www.sssscomic.com/comicpages/196.jpg
I’m Finnish and I’ve had a Polish friend for 15 years and I can say you’re most definitely mistaken.