More likely the thought of another costly foreign war when full preparation not yet done:
“I will never send our finest into battle unless necessary, and I mean absolutely necessary, and will only do so if we have a plan for victory with a capital V,”
Donald Trump speech 2016.
He went on to say:
“The world must know that we do not go abroad in search of enemies.”
He has re-iterated that sentiment on Iran recently, it can be difficult to deal with regimes that are aggressive and are quick to use their guns.
Btw - kudos to the Royal Navy - that’s how to deal with high seas bullies.