No, is the short answer. It's not helpful to always take notice of what the people are saying, unfortunately 'the people' en masse are idiots and not to be trusted.
Ultimately she runs a for profit company, and she is beholden to the capital interests of that company. She is not beholden to her customers, but she obviously would do well to please them.
To quote Henry Ford (of Ford Motors) “If I had asked people what they wanted, they would have said faster horses.”
She can pay attention to the good ideas, but she doesn't have to pay attention to the obviously bad ones.
Just look back at some of the suggestions on this very forum, for this park and others, and you'll see that some ideas are demonstrably terrible. (A carvery at Towers, or a Wetherspoon, or a Gregg's, seriously?)
She's also being honest in her response. Sometimes she'll hear an idea and take notice, sometimes she won't. We all do that every day in our lives. If we paid everyone and everything they said notice we'd never get very far.
I don't think that she should, or anyone should, always take notice of what people are saying. You can also get bogged down in bad reviews, or immediate feedback, and then never get out the other end as you'll be forever chasing your tale.
If Towers had paid attention to what everyone was saying, we'd still have The Black Hole and Log Flume. Instead we've got two of the best coasters in the country as their replacements. I have fond memories of both former rides, but even I've got to admit that their replacements are better for the park as a whole, and the general experience.