Science is a tool, it is not a philosophy. Scientism is a philosophy, one which has created its own followers amongst atheists who claim that science can bring them the truth.
Science cannot and probably will not ever answer the most fundamental question of ourselves, what is subjective experience aka consciousness. If you have studied science thoroughly and especially computer science and neuroscience, you will know this to be true.
I do feel that Scientism will create its own religions, like the Singularity faith and other big ones. Such 'new religions' have the same old formulas, and will probably last for a long time well after their creators die.
Generally people who believe in Scientism don't have deep training in science themselves, and are generally ex religious fundamentalists, who become atheist fundamentalists after their 'transformation'.
If Science can never fully explain what it means to be human: to love, hate, see colors, love music, etc then it has hit a roadblock and Scientism is also eventually doomed to fail.
Religion provides hope, meaning, strength, community and collective power. It also provides hate, war, tribalism, etc.
Science provides solutions to problems. But it also creates extremely effective weapons of destruction, and a whole new host of problems with every old problem it solves.