The agricultural revolution displaced farm workers with machines. There was unrest and migration to cities, and eventually that fed the Industrial Revolution and created a working class.
Change is tough, but we will all be fine.
What it took was social democracy and unions and other social movements.
Saying that "it's happened before, it'll be alright" is a bit naive and short-sighted.
It may have worked out fine for humanity as a whole, but it ignores the suffering of a lot of people.
In a world where AI has not yet taken all the jobs, when a company provides lousy service, why do its employees deserve to keep their jobs more than the customers deserve good service?