This lead me to this

Similarly, there can be ambiguity in the use of the slash symbol / in expressions such as 1/2x.[5] If one rewrites this expression as 1 ÷ 2xand then interprets the division symbol as indicating multiplication by the reciprocal, this becomes:

1 ÷ 2 ×x= 1 × 1/2 ×x= 1/2 ×x.

With this interpretation 1 ÷ 2xis equal to (1 ÷ 2)x.[1][6] However, in some of the academic literature, multiplication denoted by juxtaposition (also known as implied multiplication) is interpreted as having higher precedence than division, so that 1 ÷ 2xequals 1 ÷ (2x), not (1 ÷ 2)x. This higher precedence itself implies the need for an updated mnemonic PEIMDAS, with I = Implied multiplication.

For example,the manuscript submission instructions for the[a]Physical Reviewjournals state that multiplication is of higher precedence than division with a slash,[7] and this is also the convention observed in prominent physics textbooks such as theCourse of Theoretical Physicsby Landau and Lifshitz and theFeynman Lectures on Physics.

Why are physicists allowed to break the rules? What reasoning does the Physics Review and Feynman have for making multiplication of higher precedence than division with a slash? And doesn't this cause problems for consistency within Physics?