Question

it is important that scientists be seen as normal people asking 为什么后面句

Answer 1

这个是省略should的虚拟语气。
原句是：
it is important that scientists should be seen as normal people asking...
形式主语it is +necessary / essential / important...that...后面句子用虚拟语气，should可以省略也可以不省略。

Answer 2

虚拟语气在主语从句中的用法：在"It is important (strange，natural，necessary)that…"这类句型里，that所引导的主语从句中的谓语动词常用 “should十动词原形”结构，表示某事是"重要"、"奇怪"、"自然"、"必要"等意义，should可以省略。如:
It is important that every member (should) inform himself of these rules. 重要的是每个成员知道这些规则。