I agree with your concerns.

For info, see https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2022-January/019741.html about the Bitcoin Legal Defense Fund.

"Currently bitcoin core developers are funded by renewable grants provided by Brink, an independent, London based non profit. As a result of the long bear market funding has reportedly been stretched thin."

Several organizations have fortunately been funding developers to work full-time. The longest-running ones that are currently active are probably Blockstream, Chaincode Labs, Spiral (previously Square Crypto), HRF (Human Rights Foundation), BitMex and OkCoin, along with Brink and Strike, among others that are more recent. Gemini unfortunately recently shuttered their funding program called Superlunar. Compass Mining and Coinbase also did some funding but AFAIK not currently.