No one got offended if they only invited to the evening reception. I’m not sure when that became a thing.
Probably when the whole thing because a big production for the couple rather than the guests and increased importance on the venue and fripperies rather than what a wedding traditionally was, a feast. Hence, evening do's with no thought given to them at all besides a cheesy poem to give money, save the dates for evening do's, invitations that require travel and/or staying over or even to a destination wedding but only to the evening do, undercatered or, I've seen this, no food at all on offer for the guests, not even to buy, over-priced and watered down drinks, just basically no hospitality at all but expecting a lot from attendees and/or becoming offended if the invited person declines.
Or shitty timing, this seems common, too, where the first tier overruns (usually through the ghastly tradition of boring, overly long speeches no one cares about) so the guests show up and are kept waiting, sometimes outside in poor weather, listening to all the a-listers eating and drinking, only to come in and not even get so much as a cup of tea.
Also a trend of inviting people to the ceremony, not local but requiring travel and then telling them to fuck off whilst the first tier guests and fed and watered and then come back.