Does anyone else find it strange that treasury bonds are taxed at income tax rate and not capital gains rate?

So I jumped on the bandwagon and bought 10k in I bonds earlier this year as the 9+% was very appealing. I already knew that if you sell before the full 5 year, the last quarter basically doesn’t count so it really 9.5% over 1.25 years or 7.5%sh for 1 year. After doing a little more research, I realized bonds are taxed at income rate not capital gains rate (never invested in bonds before). That brings the 7.5% down another third or so to 5%. This is still probably my best investment of the year considering all of my stocks are down, but I still think it’s strange that the American government taxes the bonds they sell to you at a higher rate than stocks of companies.