At first I was like "wait, so you should promote dishonestly?" But then I read the rest of it and I get what you mean XD
This! I feel this so hard. My real issue right now is that I HAVE JACK ALL CONTENT, and creating more of it is going to do me more favours than any amount of promotion
Though I do see some comics out there with lots of content but not that much engagement, so I do think the advice of "just keep chugging and the audience will come eventually" might not always be enough