I don't think it's reasonable to lump funerals and weddings together here.

Funerals are time-sensitive (a person dies and the funeral needs to happen within a certain amount of time) and the people doing the planning are emotionally devastated and there might not even have been a budget in place in advance. Guilt can often be leveraged against the family, with the implication that if they don't go all out they are failing their dead family member.

Weddings can happen whenever the couple wants, they have all the time they want in order to plan, there are readily available budget-friendly options (courthouse), and while guilt can be used it generally comes from within the family rather than the industry itself (your wedding planner is not telling you that you HAVE to invite all 50 cousins or you'll break grandma's heart, your mom is telling you that). People go into wedding planning much more clear-headed than funeral planning and generally have a better idea even in advance of the inciting event (engagement/death) what they want to do. People don't like thinking about funerals and death planning in advance, but tons of people already have an idea of what they want their wedding to look like.

All in all, bad comparison.