Hmm. Allow me to rephrase. Clearly, we are assuming two different current states. I indicated that T2 was made almost 30 years ago with MASSIVE improvements across just about every facet of computer generated visuals. That movie cost 100 million to make ( about twice that in today's dollars adjusted for inflation ) and it had some stars in it ( Arnold reportedly being paid cool $15M ), which easily explains some of the cost.
I am not assuming its cheap and easy. I am assuming it is both cheaper and easier than it was and noticeably so.
All that said, I think we may be just approaching it differently. Let me share my thought process.
Cameron suggested the actual CGI scene count is 42[1] ( we can do 50 for easier math, but 42 will favor your position so lets assume 42 ).
According to wiki[2] CGI budget was 15M-17M ( and lets assume 17M to account for the upper cost to accommodate your view of CGI cost ).
At $17M for 42 an instance of CGI comes to $404k a pop for T2. Unfortunately, this is misleading as it does not give us a good way to compare against Turning Red as its all CGI, so we need to compare in minutes ( tr is 1h40m or 100 minutes ). Without doing any real analysis, I have to rely on net again[1], where we learn that:
"all the work required to bring the T-1000 to life, costing $5.5 million, and taking eight months to produce, which ultimately amounted to 3.5 minutes of screen time. "
5.5M/3.5 = $1.571M per minute for Terminator 2 ( or about ~3M USD adjusted for inflation ).
In other words, adjusted for inflation re-running TR assuming the same cost as T2 results in 300M ( 100 minutes * 3M per minute ) projected CGI cost for TR ( almost double TR's budget, which we know was not all CGI ). In other words, CGI has gotten almost 100% more efficient, partially because I seriously doubt entire $175M TR budget went to CGI ).
I am not arguing its peanuts ( although I am sure argument could be made what with current AI tools ), but it is definitely more cheap.
To be fair, it might not be more easy ( that I have zero knowledge of ).
[1]https://computeranimationhistory-cgi.jimdofree.com/terminato...
[2]https://en.wikipedia.org/wiki/Special_effects_of_Terminator_...