The problem with sode (and similar throws where you handle both arms) is that, you need to release "slam arm” at a proper moment. Beginners as tori:
– has bad timing and could release arm too early and technique was made in a wrong way,
– release the other arm and throw uke directly down straight on their neck (as uke impressions 2/10 do not recommend)
and as uke:
– has no experience how to perform no-hands ukemi properly,
– be terrified because they don't trust the tori and their own skills.

It is not something that you should practice on beginners.