The ultimate store of value is the ultimate layer 1. Bitcoin is that ultimate store of value, so it is the ultimate layer 1.
Monero used as the store of value layer is not as good as Bitcoin.
If monero users believe monero's privacy benefit and tail emissions outweighs the Bitcoin networks auditable nature and halving-driven store of value I would argue they are incorrect.
If monero was simply used as a better than FIAT alternative for its perceived privacy benefit, similar to how a user might choose to use the liquid or lightning networks on Bitcoin for greater privacy, than effectively it's being used as a layer 2 for value transfer which is perfectly fine.