I guess you can't argue against a system that builds a house, then blows it to smithereens and calls it "progress."
Physics is about how nature works -- for example, the theories called Newton's laws are a great classic example -- and the the aim and goal of physics
isn't to build a 'house' exactly, but instead the main goal continues to be to figure out how nature is constructed/works.
The goal is
discovery of what
already exists.
What is nature's deep design? That's what physics seeks to discover.
To understand nature better. To find out how nature works more fully, until maybe someday we might have the most fundamental design begin to appear.
So, any theory is then both a step
but also possibly a wrong step or a step that leaves us without a clue where to go next, and so the continuing process is to continue to find new ways to
test still surviving theories (that haven't yet been shown wrong), aiming to find where existing theory fails in a very precise way, using any technique/observations we can -- to get that key direction for the next step: to find the precise limit or exact situation where a strong existing theory fails. (the precise exact situation where a theory fails is an invaluable clue of why it failed and a helpful guide to devise new theories that could possibly work in that situation/area/domain, which will then need to be tested as possible in any way physicists can figure out)