I do have to bring up one objection to making Scientism one's central tenet - at least taken to the religious extreme.
You will, at least a few times in your life possibly, find yourself in a position where explanations of the makeup of the universe, how things move, or why, won't be relevant to your predicament nor will they necessarily help you find a path through it. There are perhaps helpful answers on the edges of psychology but, like with many things, you'll be using unsubstantiated tools and at least entertained possibilities about the future, yourself, implied meaning, etc..
Don't get me wrong, I think a person could have a scientific reductionist worldview and apply various things like depth psychology and Jung to their subconscious life out of the realization that emergent patterns, particularly in biological life, are highly complex and not intuitively derived straight from their pieces and parts but rather qualities of interaction. From that standpoint they'd consider that its impossible to hammer one's subjective life into an exact facsimile of objective life and that the subjective arena has its own laws that need to be followed for good health. IMHO Jordan Peterson does an excellent job of making a case for Jung in evolutionary psychology.
I'd say that having faith in science when it comes to material matters of discovery is well founded - ie. the progress we've enjoyed over the last 300-400 years is no joke, and it seems like discoveries should continue for a long time. What I wouldn't do necessarily is take Scientism's metaphysical claims all that seriously. Such claims extend beyond the scope of science and there are a lot of big questions that we simply don't have answers to. Any attempt to assert an answer at this point tends to be a leap of faith, exchanging accuracy for certainty, and its fair to live by certain metaphysical assumptions insofar as they match your experience but taking them too seriously just means you'll get thrown around by emotional reactions to facts that run contrary and whether it's theism, deism, materialist atheism, nonmaterialist atheism, panpsychism, almost any system you can think of will run into contradictions and items that would undermine your faith in the steadiness of your answer.
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The loneliest part of life: it's not just that no one is on your cloud, few can even see your cloud.