I would like to hear an explanation of this too. I have always thought of 要 as a fairly direct "want to" and 想 as a slightly more polite "would like to". And I don't see how this example sentence gives reasons for why "want to" shouldn't be acceptable.

When implementing the sentences with location verb, you include 在 after the verb. Think movement or location when translating such sentences.

• Correct: 我坐在這裡 (since "movement" is being done here)
• Incorrect: 我在這裡坐

Note carefully that the second sentence is translated to "In here, I sit", which is not the same as "I sit here" since the second earlier indicates the location instead of making the verb do the work with it.

This guide might help.

I explained it in this thread:

https://www.duolingo.com/comment/25531295

For me, that sounds wierd. Wo men xiang ze bian zuo sounds better.

想 is also "want to". I think 要 should be accepted here, but sometimes the difference between 想 and 要 is a bit subtle, I think. They seem to be often used interchangeably.