“No choice” was when I was in university. Text books didn’t have web sites then. To be honest I have no idea how frequent they are now. In any case, solutions not being available to students was a normal and expected situation back then, and it helped me develop grit for solving problems, because I’m otherwise quite lazy.

"No choice" here means you didn't choose the textbook, you (or your benefactor) simply paid for it.

I don't think "normal" is any excuse for any behavior. At one time, not so long ago, <insert evil thing here> was normal.

If you need information withheld from you to learn because of laziness, fine, sorry you have that problem, good luck solving it. It should not become the problem of anyone else nor be considered acceptable to impose a solution for you on them at their expense. That's just rotten.

Any textbook that is incomplete to learn from independently, without a "professor" reading a slide deck, without TA's and a yearly bill of over $10k over and above the textbook is not worthy of the name textbook and should be treated by every educated person with contempt. Same companies rent-seeking that do academic journals right. Hate isn't too strong a word for them if we care about education over rent-seeking.

4th edition usually means 3rd time the publisher re-ordered the exercises so the numbers don't match to kill the 2nd hand market. The whole thing blows goats.