They made a choice that safe addition takes 3-4 instructions, and wrapping one (rarely used except for cryptography) takes 1 instruction. Doesn't it make more s

They made a choice that safe addition takes 3-4 instructions, and wrapping one (rarely used except for cryptography) takes 1 instruction. Doesn't it make more sense to make often-needed safe addition 1 instruction and rarely needed one to take 3-4 instructions?