It's not really lying or deceit. It's just companies talk about their future-perfect-best self during the interview and offer - as does the candidate.
The unspoken rule is that things can change dramatically in a few hours and each party should deal with it - which means it's also totally ok to back out of the offer you received and move on.
The unspoken rule is that things can change dramatically in a few hours and each party should deal with it - which means it's also totally ok to back out of the offer you received and move on.