The people at Ethereum say the same thing. I'm honestly not trying to be antagonistic, but I have as little faith in the Bitcoin Core devs being able to scale Bitcoin as I do in the Ethereum devs being able to scale Ethereum. The scaling solutions all seem to be just around the corner, while reality is catching up fast.
I'm honestly beginning to think they're just playing musical chairs, and selling us fairy tales to hide the fact that, on a fundamental, structural level, 1st and 2nd gen cryptocurrencies just cannot scale.
I think the future will have to be either DPOS or some form of DAG.
It's the implementation if the new tech that's the problem. Segwit code is has been available fo a year. Yet the Coinbase and alot of big companies have not yet implemented it. Yet some little wallets have it. Lightning code is now available for development it just needs implementation. Which isn't up to core. It's up to the BTC wallets to implement the upgrades. They are there. It's a bit of fud to say they aren't really working on it.