It doesn't matter who wrote this bit.
Ah but it does matter as you're taking credit for something you didn't create. What would be more appropriate is to say, "I asked ChatGPT for an answer to your question and this is was its response:
As an AI model, I can't... However... It's essential... Furthermore... It is important to keep in mind that... etc.
"
Then it is clear what you're doing instead of taking credit and leading others to believe you are actually knowledgeable about said thing.
If you call this being lazy, well, good luck churning your own butter, don't know what to tell you.
Its peak laziness, on par with the laziness of plagiarism.
Nobody assumes you made the butter you're eating, that's the difference. You're not implicitly pretending you made the butter. When you paste text without crediting the source, you're basically saying "I made this," when you didn't. That's dishonest.