Well, I wouldn’t know what kind of contract that is that doesn’t bind you to anything.
It does bind, but only for a special case.
Normally we are talking here about a plain contract for work and services, possibly with a right of withdrawal/reservation for property acquisition. This means in any case that you will build with this company, no matter who found the property. Buying out is of course also possible.
Generalization. You don’t know this contract draft and are making assumptions.
I have already read quite a few things from you. I wouldn’t buy a house from you.
That’s how selling works! Without much fuss! All other structures regarding a preliminary contract are ... and only intended to confuse and bind potential builders!
Sometimes there is indeed “fuss” involved. Even if only because the person using the contract has no special knowledge either. The idea is clear and commercially understandable. And there are a number of contracts that are supposed to somehow “secure” the pre-sale process. Behind this is the requirement that money should be earned with the work done. That is paid by the interested party, who preferably would rather not pay here.
Basically, however (as always) applies here too: construction supervision by an expert / contract supervision by a lawyer. Then everything is often in proper order. Many have no idea about building and mostly they know that. Most have no idea about contracts but don’t believe that.