Because I reject the notion that it is "too expensive to transact with". With bitcoin, I can pay someone $100 for a couple of cents. I can pay someone $10,000 for a couple of cents. I can pay someone $1 million for a couple of cents. That is hardly "too expensive" for the buyer. Some fiat transactions are free for the buyer, sure, but some, such as large payments which need approval from your bank or cross border payments, will slap ridiculous fees on top, far more than that which is charged with bitcoin. For the merchant, there is just no comparison. It's free to open a bitcoin wallet and accept bitcoin, but you could end up paying hundreds or even thousands of dollars in fees in the fiat system.

That's without even touching on all the other benefits of bitcoin, such as being faster, protection from chargeback, privacy, no KYC, no third party telling you what you are and are not allowed to spend your money on, and so forth.

I think if more people realized the advantages of bitcoin over the fiat system, then yes, it would help adoption.