Yeah, that's what some apologists said about Apple Watch a few years back.
What the haters said is also familiar:
Remember Apple Watch? Me Neither. - Seeking Alpha
Analyst: Interest in the Apple Watch is 'lackluster' - Fortune
Apple Watch sales fall 55% as consumers mark time on category - Financial Times
I don't think Apple ever planned for the HomePod to be a single product. As people build out their HappyLife Homes, they are going to need smart speakers in most every room (and maybe some outside, too). Apple wants to be a player in that game. The 2018 HomePod is just the first entry.
And I don't think Apple is late to the game either. This is more about home automation than it is about music, and home automation is still in its larval stage. Music and television are just two of the things that Apple can help automate.
I feel confident in saying that physical light switches will one day seem quaint (like newspapers and POTS landlines). I don't feel as sure saying what the replacement will be like. Are we doomed to a future of shouting "Hey Siri" or "Alexa"? I kind of think our HappyLife Homes will be smart enough to tell the difference between a command and human to human conversation. There is still a lot of work to do before that's ready, and I think when it is ready, no one will be claiming that Apple missed the boat back in 2018.