Because lawyers deal with different people. Litigation lawyers will travel back and forth between the parties, courts, procuratorates, and public security bureaus, while non-litigation lawyers will deal with entrusted companies or individuals, business-related state units, etc. Corporate legal counsel are usually colleagues within the company, and may also include external lawyers.
.Career development paths are different. A lawyer's experience is from paralegal to lawyer to partner, while a company's legal experience is a career development path from legal assistant to legal specialist to head of the legal department.