为什么导入spring-boot-dependencies而不是spring-boot-starter-parent


<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-dependenciesartifactId>
            <version>2.1.8.RELEASEversion>
            <type>pomtype>
            <scope>importscope>
            dependency>
    dependencies>
dependencyManagement>


<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
             <artifactid>spring-boot-starter-parentartifactid>
            <version>2.1.8.RELEASEversion>
            dependency>
    dependencies>
dependencyManagement>