The question of 'miracles', or lack of them, are prone to unsubstanciated 'if-thens' that make people unable to explore rich middle grounds. The following are extreme ends of the pendulum.
1.)Miracles can happen. Thus we leave in a world where anything can happen at anywhere at any time. Furthermore there must be an omnipotent being behind them exactly like the one described by religions.
2.)Miracles cannot happen. Therefore we leave in an entirely mechanical world like the one described in mainstream science.
3.)If you can perform miracles then you are either an agent of the devil or an agent of God, as described in scriptures.
I use 'miracles' in quotes because even the very common definition as 'that which cannot be explained by scientific laws' is problematic if not downright silly. We don't know everything about 'laws of science'.