understandably so
Definitions
In a manner that is logical, expected, or easy to comprehend given the circumstances.
With good reason; naturally or justifiably.
Examples
The team was disappointed by the sudden cancellation of the project, and understandably so.
She was nervous about her first public performance, and understandably so given the size of the audience.
Synonyms
quite reasonably justifiably so with good reason unsurprisingly predictably
Antonyms
inexplicably unjustifiably without good reason surprisingly illogically