No. I'd argue every product needs a support function regardless of how intuitive it is:
1. All users are not the same.
What might seem obvious to one, might not to another.
Software tends to be more complex than single-function products like toasters.
2. CS extends beyond usability issues.
Case-specific problems like billing woes, refunds and data loss still warrant support. Even Netflix needs this.
3. CS doesn't just fix issues. It educates.
The best customer service helps users realize how to maximize the value from their purchase.
4. CS holds strategic value for a PM.
Nothing is perfect. CS tickets help highlight frustrations in the wild & are a key input in product ideation.
There will always be a user segment that demands human touch.
Several people skip suggested KB articles to ask the same question from a person.
I can envision chatbots taking over more load once they become harder to distinguish from a real human. Still not there yet.
As a Product Manager, you might be asked a lot of questions during an interview. One of them includes technical questions. Here are 4 types of technical questions that you might come across.