Bitcoin can do all that Ethereum can?

I browse r/bitcoin and read many pro-bitcoin posts (i hold and love BTC, as well as ETH) and I've constantly seen this notion that all that ETH is doing now can easily be done with BTC. Is this true? I was not aware that Bitcoin had the opcode richness of ETH, but maybe BTC accomplishes this with some of its layer-2s. Curious to hear from those more knowledgable than me (so basically everyone else)