Physics scores law on literacy and interest in high school, together with history. Although students are prejudiced against evidence-based thinking in favor of logical syllogism, which permeates these subjects, i believe other reasons of the educational system's fault are to blame.
Its worth to mention that unpopularity is related to failure rate since passion is part of equation of success
I divide the reasoning in 2 parts
I. Wrong or narrow focus of content
Curricula focus on classical mechanics topics, a highly abstract and highly special -mechanistic- thinking area, which are 1/5th of physics and on these narrow even deeper to calculations of specific cases by 80% in assesments vs conceptual understanding, understanding of foundations, questions on, general principles independent of spefific cases content or calculation-ladden etc
II. Ommissions& late timing
Modern physics and knowledge-compatible topics are ommited. X rays, radioactivity, lasers should comprise 30% of curricula and be intriloduced hy 4th grade as other sibjects do i.e modern history
Heat, gasses topics which are less mechanistic or even entropy which has philisophical aspects that draw students to science are almost absent
III. Wrong alignment of content to assesment
Current alignment is obly 10 to 20 of knowledge based content, related to both domination of mechanics and the emphasis of assesment to calculations in specific cases. This should be minimum 50% and would improve scientific literacy dramatically, together with lowering the enphasis on calculations to beliw 50% evenaybe down to 20 or 30%